{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/23784"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/23784","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"The chemistry of manganese alkyls and aryls and of divalent titanium phenoxides","abstract":"The organometallic chemistry of divalent, trivalent, and tetravalent manganese has received little attention despite intensive interest in the organometallic chemistry of the transition metals over the last 25 years. Similarly, the development of divalent titanium and vanadium chemistry has been quite limited. The study of organomanganese complexes and low-valent early transition metal complexes can provide insight into processes such as organic oxidations by manganese-containing complexes and Ziegler-Natta olefin polymerizations, respectively.","abstract_html":"The organometallic chemistry of divalent, trivalent, and tetravalent manganese has received little attention despite intensive interest in the organometallic chemistry of the transition metals over the last 25 years. Similarly, the development of divalent titanium and vanadium chemistry has been quite limited. The study of organomanganese complexes and low-valent early transition metal complexes can provide insight into processes such as organic oxidations by manganese-containing complexes and Ziegler-Natta olefin polymerizations, respectively.","abstract_has_math":false,"creators":["Morris, Robert Joseph"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Chemistry, Inorganic","degree_department":null,"school":null,"contributors":["Girolami, Gregory S."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-07T14:26:56Z","date_published":"2011-05-07T14:26:56Z","updated_at":"2026-07-22T22:25:22Z","subjects":["Chemistry, Inorganic"],"languages":["eng"],"rights":["Copyright 1990 Morris, Robert Joseph"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9114351","(UMI)AAI9114351"],"render_values":[{"text":"AAI9114351","href":null,"code":true},{"text":"(UMI)AAI9114351","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/23784","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Girolami, Gregory S."]},{"key":"dc:creator","label":"Author","values":["Morris, Robert Joseph"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-07T14:26:56Z","10000-01-01","1990"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemistry, Inorganic"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Chemistry, Inorganic"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 1990 Morris, Robert Joseph"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9114351","(UMI)AAI9114351","http://hdl.handle.net/2142/23784"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The organometallic chemistry of divalent, trivalent, and tetravalent manganese has received little attention despite intensive interest in the organometallic chemistry of the transition metals over the last 25 years. Similarly, the development of divalent titanium and vanadium chemistry has been quite limited. The study of organomanganese complexes and low-valent early transition metal complexes can provide insight into processes such as organic oxidations by manganese-containing complexes and Ziegler-Natta olefin polymerizations, respectively.","The reaction of MnCl$\\sb2$ with 4 equiv of an organolithium reagent followed by the addition of N,N,N$\\sp\\prime$,N$\\sp\\prime$-tetramethylethylenediamine (tmed) gives a series of tetraalkyl manganate(II) complexes of stoichiometry (Li(tmed)) $\\sb2$(MnR$\\sb4$) (R = Me, Et, CH$\\sb2$CH$\\sb2$-t-Bu, n-Bu, CH$\\sb2$SiMe$\\sb3$, and Ph) in good yields. The molecular structures of the methyl, ethyl, and neohexyl complexes are the first transition metal peralkyls wich contain $\\beta$-hydrogen atoms to be structurally characterized.","The addition of 2 equiv. of methyllithium to MnMe$\\sb4$(dmpe) followed by treatment with tmed gives the first tetravalent peralkyl manganate, (Li(tmed)) $\\sb2$(MnMe$\\sb6$), in good yield. This tetravalent species reacts with the divalent species (Li(tmed)) $\\sb2$(MnMe$\\sb4$) in diethyl ether to give the trivalent permethyl manganate (Li(tmed)) $\\sb2$(MnMe$\\sb5$) in a comproportionation reaction. If the comproportionation is performed in toluene, the product is the tetramethyl manganate(II) species (Li(tmed)$\\sb2$) (MnMe$\\sb4$).","The interaction of manganous halides with 1/2 equiv. of the diarylmagnesium reagent MgMes$\\sb2$(thf)$\\sb2$ and 2 equiv. or trimethylphosphine in diethyl ether followed the addition of dry dioxygen leads to the isolation of a series of trivalent arylmanganese(III) species of stoichiometry Mn(Mes)X$\\sb2$-(PMe$\\sb3$)$\\sb2$ (X = Cl, Br, and I). The molecular structure of Mn(Mes)-Br$\\sb2$(PMe$\\sb3$)$\\sb2$ is a slightly distorted trigonalbipyramid with the phosphine ligands occupying the axial positions. Treatment of Mn(acac)$\\sb3$ with 5 equiv. of LiMe leads to the isolation of the first oxoalkyl of manganese which has the stoichiometry $\\{$Li$\\sb2$(MnOMe$\\sb3$) $\\cdot$ 2Li$\\sb2$(OCMe=CHCMe$\\sb2$O) $\\cdot$ tmed$\\}\\sb2$. The molecular geometry around the Mn$\\sp{\\rm III}$ center is also a slightly distorted square-plane.","Treatment of Ti(BH$\\sb4$)$\\sb2$(dmpe)$\\sb2$ with 2 equiv. of sodium phenoxide in tetrahydrofuran gives Ti(OPh)$\\sb2$(dmpe)$\\sb2$ which is the first divalent titanium aryloxide or alkoxide of any kind. Along with TiMe$\\sb2$(dmpe)$\\sb2$, these three compounds are the only octahedral d$\\sp2$ metal centers of the first-row transition series to exhibit spin-pairing within the t$\\sb{\\rm 2g}$ manifold; the conplexes are diamagnetic. The spin-pairing of the two d-electrons in TiMe$\\sb2$(dmpe)$\\sb2$ is the result of $\\pi$-bonding from the reduced titanium center to the triaklylphosphines; the spin-pairing in the phenoxide complexes is due to $\\pi$-donation from the phenoxide groups.","Made available in DSpace on 2011-05-07T14:26:56Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9114351.pdf: 4990895 bytes, checksum: 8d7a1904499aa4e3c59f523db6e1d835 (MD5) Previous issue date: 1990","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T15:06:49Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:32:06-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"]},{"key":"dc:title","label":"Title","values":["The chemistry of manganese alkyls and aryls and of divalent titanium phenoxides"]}]}],"canonical_facts":{"dc:contributor":["Girolami, Gregory S."],"dc:creator":["Morris, Robert Joseph"],"dc:date":["2011-05-07T14:26:56Z","10000-01-01","1990"],"dc:description":["The organometallic chemistry of divalent, trivalent, and tetravalent manganese has received little attention despite intensive interest in the organometallic chemistry of the transition metals over the last 25 years. Similarly, the development of divalent titanium and vanadium chemistry has been quite limited. The study of organomanganese complexes and low-valent early transition metal complexes can provide insight into processes such as organic oxidations by manganese-containing complexes and Ziegler-Natta olefin polymerizations, respectively.","The reaction of MnCl$\\sb2$ with 4 equiv of an organolithium reagent followed by the addition of N,N,N$\\sp\\prime$,N$\\sp\\prime$-tetramethylethylenediamine (tmed) gives a series of tetraalkyl manganate(II) complexes of stoichiometry (Li(tmed)) $\\sb2$(MnR$\\sb4$) (R = Me, Et, CH$\\sb2$CH$\\sb2$-t-Bu, n-Bu, CH$\\sb2$SiMe$\\sb3$, and Ph) in good yields. The molecular structures of the methyl, ethyl, and neohexyl complexes are the first transition metal peralkyls wich contain $\\beta$-hydrogen atoms to be structurally characterized.","The addition of 2 equiv. of methyllithium to MnMe$\\sb4$(dmpe) followed by treatment with tmed gives the first tetravalent peralkyl manganate, (Li(tmed)) $\\sb2$(MnMe$\\sb6$), in good yield. This tetravalent species reacts with the divalent species (Li(tmed)) $\\sb2$(MnMe$\\sb4$) in diethyl ether to give the trivalent permethyl manganate (Li(tmed)) $\\sb2$(MnMe$\\sb5$) in a comproportionation reaction. If the comproportionation is performed in toluene, the product is the tetramethyl manganate(II) species (Li(tmed)$\\sb2$) (MnMe$\\sb4$).","The interaction of manganous halides with 1/2 equiv. of the diarylmagnesium reagent MgMes$\\sb2$(thf)$\\sb2$ and 2 equiv. or trimethylphosphine in diethyl ether followed the addition of dry dioxygen leads to the isolation of a series of trivalent arylmanganese(III) species of stoichiometry Mn(Mes)X$\\sb2$-(PMe$\\sb3$)$\\sb2$ (X = Cl, Br, and I). The molecular structure of Mn(Mes)-Br$\\sb2$(PMe$\\sb3$)$\\sb2$ is a slightly distorted trigonalbipyramid with the phosphine ligands occupying the axial positions. Treatment of Mn(acac)$\\sb3$ with 5 equiv. of LiMe leads to the isolation of the first oxoalkyl of manganese which has the stoichiometry $\\{$Li$\\sb2$(MnOMe$\\sb3$) $\\cdot$ 2Li$\\sb2$(OCMe=CHCMe$\\sb2$O) $\\cdot$ tmed$\\}\\sb2$. The molecular geometry around the Mn$\\sp{\\rm III}$ center is also a slightly distorted square-plane.","Treatment of Ti(BH$\\sb4$)$\\sb2$(dmpe)$\\sb2$ with 2 equiv. of sodium phenoxide in tetrahydrofuran gives Ti(OPh)$\\sb2$(dmpe)$\\sb2$ which is the first divalent titanium aryloxide or alkoxide of any kind. Along with TiMe$\\sb2$(dmpe)$\\sb2$, these three compounds are the only octahedral d$\\sp2$ metal centers of the first-row transition series to exhibit spin-pairing within the t$\\sb{\\rm 2g}$ manifold; the conplexes are diamagnetic. The spin-pairing of the two d-electrons in TiMe$\\sb2$(dmpe)$\\sb2$ is the result of $\\pi$-bonding from the reduced titanium center to the triaklylphosphines; the spin-pairing in the phenoxide complexes is due to $\\pi$-donation from the phenoxide groups.","Made available in DSpace on 2011-05-07T14:26:56Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9114351.pdf: 4990895 bytes, checksum: 8d7a1904499aa4e3c59f523db6e1d835 (MD5) Previous issue date: 1990","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T15:06:49Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:32:06-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"],"dc:identifier":["AAI9114351","(UMI)AAI9114351","http://hdl.handle.net/2142/23784"],"dc:language":["eng"],"dc:rights":["Copyright 1990 Morris, Robert Joseph"],"dc:subject":["Chemistry, Inorganic"],"dc:title":["The chemistry of manganese alkyls and aryls and of divalent titanium phenoxides"],"dc:type":["text"],"thesis:degree_discipline":["Chemistry, Inorganic"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:22Z"}